Ebenezer c



E. 0. JEWSBUR'Y.

(No Model.)

WINDMILL.

No. 450,314. Patented Apr. "14, 1891.

Saw/ Q1. M 3513 61mm 9 UNITED STATES PATENT FFICE.

EBENEZER C. JEWSBURY, OF JERSEYVILLE, ILLINOIS.

WINDMILL.

SPECIFICATION forming part of Letters Patent No. 450,314, dated April 14, 1891'.

Application filed January 80, 1891. Serial No. 379,723. (No model.)

To all whom it may concern:

Be it known that I, EBENEZER C. J nws- BURY, of Jerseyville, in the county of Jersey and State of Illinois, have invented a new and Improved WVindmill; and I do hereby declare that the following isa full and exact description of the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon.

My invention relates to an improvement in windmills of that type in which the windwheel revolves upon a vertical axis and has one-half only exposed to the action of the wind. 7

My object is to provide a windmill of the type above referred to, but more simple in construction and more efiective in operation than those heretofore in use.

With these ends in view my invention consists in certain details of construction and combinations of parts fully explained in the following specification, and illustrated in the accompanying drawings, in Which- Figure 1 is a front elevational view of the upper portion of the mill. Fig. 2 is a side elevational view of the same, and Fig. 3 is a top view of the mill.

Referring to the drawings, A represents a circular platform supported upon posts B. In the center of said platform is journaled a vertical shaft 0, upon the upper end of which is secured a wind-wheel D, provided with wings or leaves a, as represented in Fig. 3.

In order to shield one-half of the windwheel from the action of the wind, it is inclosed in a semicircular box or covering E, the top and bottom of which are journaled upon the shaft 0, as shown at S S, Figs. 2 and 3. At the top and bottom of said box or covering E is pivoted at the points b b, so as to vibrate in a horizontal plane, a tailvane F, the upper arm 1* of which is prolonged forward so as to engage by contact with a short bar or cam 2', pivoted at t to the top of the shield E. (See Fig. 3.) Said bar or cam is connected by means of a rod J with a pressure vane or board 19, pivoted at its lower end to the top of the shield E, so as to face the wind. On the top of the shield is secured a rearward-projecting stud f, upon which is pivotally mounted a bent lever is, connected, as shown in Figs. 1 and 2, by

means of a rod 9 with the tail-vane E, the long arm of said bent lever being provided with a weight g, adapted by means of a setscrew to be secured at any required distance from its fulcrum.

It will be observed that the tail-vane is free to swing round in the direction of the arrow only, its motion in the opposite direction beyond a position radial to the axis of the windwheel being prevented by a stud 77., against which the forward-projecting arm of the vane rests, as shown in Fig. 3.

The several parts of my mill being constructed and combined as above described, its operation is as follows: The wind blowing in the direction indicated by the arrows 1 and 2, (see Fig. 3,) the tail-vane will, under ordinary wind-pressure, bring the shield E into the position there shown and thus retain it, so that thewin-d acting only upon the exposed side of the wind-wheel will cause it to rotate in the direction of arrow 3. Now when the wind blows so hard as to cause the windwheel to rotate faster than required its action against the pressure -vane 10 thrusts Wound upon its pivot the free end of the cam or short bart' in the direction indicated by the small arrow, and thus by contact with the forward-proj ectin g arm of the tail-vane forces the latter round, as indicated by arrow 4, the

efiect of which is to cause the wind to act on one side of the tail-vane and thus bring the shield E round in the direction of arrow 6, so as to cover a portion of the exposed side of the wind-wheel to an extent proportionate to the increased pressure of the wind. As the pressure of the wind decreases, the regulating mechanism is automatically brought back to its former position by the weight g.

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

In a horizontal windmill, a speed regulating device consisting of a semicircular shield or box E, surmounted by a pressurevane 19, pivoted thereto, so as to vibrate in a vertical plane, and connected by a rod J with the free end of a cam or bar i, pivotally secured to the shield E, so as to impinge upon the side of the upper arm of the vane F and to the shield E and having upon its horizontal part an adjustable Weight, the upper end of the vertical part of lever is being connected with the vane by a rod g, all of said parts 5 constructed and combined for united action, substantially as and for the purpose herein set forth.

In testimony that I claim the foregoing I have hereunto set my hand this 25th day of October, 1890.

EBENEZER C. JEWSBURY.

Witnesses:

LEWIS, Ill. M. CUTTING. 

